Dash-pot for glass-blowing machines.



J'. RA. DASH POT FOR GLASS BLOWING MACHINESl APPLIGATION NLED ocT.6.1911.

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J. RAU. DASH-POT FOR GLASS BLOWNG MACHINES.

APPLIOATXONILBD 00126, 1911. I

'Patented Aug. 1 8, 1914 John CLU i my .roi-1n" naief, 'or innranarorlrs, rnnrnna.

DSH-,PT :FR GLASS-BLOTWENG CEACHINES.:

Specification of Letters Patent.

Application, filed ctober 6, loll.

rate-atea aug. Serial No. 653,192.

T0 all whom it may concern Be 1t known that I, Joni-I Rau, of Indianapolis, county of Marion, and State of lndiana, have invented a certain useful DashlPot for Glass-Blowing Machines; and l do hereby declare that the following is a full,

clear, .and exact description thereofT reference being had to the accompanying drawings.

The object of this invention is to provide an improved means lor controlling the descending` movement of a movable mold loottoni in glass blowing machines.

The chief 'feature ol the invention consists in providing means for yieldingly supporting and resisting the downward movement of the movable mold bottom, combined with means for accelerating the de- 'scending` movement thereof as the blowing or' the article proceeds.

The nature of the invention will be understood from the accompanying drawings and the following description and claims.

ln the drawings, Figure l is a central vertical section through a portion of the glass blowing machine, showing the movable bottom and the controlling means in an elevated position. Fig. '2 is a horizontal section on the line 2-2 of Fig. 1. Fig. 3 is the same as Fig. 2 with the Avalve controlling means in an altered positioinl Fig. 4L is a horizontal transverse section bn the line ll--l olf Fig. l. Fig. 5 is a horizontal transverse section on the line 5-5 of Fig. 1. Fig. 6 is an enlarged view ol' the lower end of the valve shown in Fig. 5, showing the port openings therethrough when the piston is 'raised to its highest position. Fig. 7 is a front elevation of a portion of the blow mold table, and the means for con.- trolling the. movement oil the mold bottom.

rlhis invention is used in machines for blowing hollow glass ware wherein the bottom of the mold is movable, being` elevated after the blank has been introduced in the blow mold and before the blowing process has been started and yielding downwardly as the blowingl process progresses.`

In detail there is shown in the drawings the lower portion of a (dass `blowing machine having a movable blow mold bottom l0 mounted on the piston rod l1 which has a piston 1Qv on its lower end having vertical movement m a closed cylinder 13 filled with a viscous liquid, said piston having a rotary va ve lll and a spring pressed vertical lift valve 15 mounted therein.

The valve 14 is mounted within the piston 12 and consists of a plate 16 through which there drilled series of holes which mate with corresponding holes through thev bottom plate 17 of the piston 12 and with a similar series or' holes through the upper portion 18 oit. said piston. Said valve 16 is mounted upon a rod 19 which extendsl upward through the piston and `through the cylinder cover Salland the .upper end has bearing within a collar 2l secured on the rod l1. A rod 23 is secured to said rod 19 and projects outward atright angles therefrom beyond the rim of the cylinder cover 20 where it is bent downward and to one side to form an angle oilapproximately thirty degrees with the vertical7 as indicated. in Fig. 2. v

There is a guide adjnstably secured to the cylinder cover 20 by screws 25 within the arched slots 2G and having a slotted Outward portion 27 thereon which projects beyond the edge of said cover 20. The inclined portion on the rod. 23 lieslwithin said slot 28 on the projection. 27 and with the guide member 24; secured in position as the mold bottom descends, the rod 23 'moving through said slot, will cause the rod 19 to be oscillated through a. small angle which moves the ports in the valve 16 into registry with the ports through the `plates 17 and 18 of the piston. The check valve l5 is opened by the liquid inthe cylinder 13 Ias the piston 12 is moved upward and allows the free passage of said liquid from the upper sido of the piston. to the lower side thereof, but will close upon a downward movement and not permit a passage therethrough.

VWith the guide 2l so positioned with regards the operating` rod on the lvalve rod l) and the ports in the valve 1G substantially in the position shown in Fig. 6, it will readily be understood that as the blowingl process proceeds, the pressure on the mold bottom 10 will cause it to yield or descend which will move the inclined portion ol' the operating rod '23 within the slot 2S on the guide 24 and cause an openingmovement o1" the valve 16, which opening;` is increased as said mold bottom and piston descend, thus allowing a more rapid descent ol'r the parts as the article being blown nears completion. 

